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Mypal/dom/plugins/base/nsPluginsDirUnix.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNPAPIPlugin.h"
#include "nsNPAPIPluginInstance.h"
#include "nsIMemory.h"
#include "nsPluginsDir.h"
#include "nsPluginsDirUtils.h"
#include "prmem.h"
#include "prenv.h"
#include "prerror.h"
#include "prio.h"
#include <sys/stat.h>
#include "nsString.h"
#include "nsIFile.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#define LOCAL_PLUGIN_DLL_SUFFIX ".so"
#ifdef XP_SOLARIS
#define DEFAULT_X11_PATH "/usr/openwin/lib"
#elif defined(LINUX)
#define DEFAULT_X11_PATH "/usr/X11R6/lib/"
#elif defined(__APPLE__)
#define DEFAULT_X11_PATH "/usr/X11R6/lib"
#undef LOCAL_PLUGIN_DLL_SUFFIX
#define LOCAL_PLUGIN_DLL_SUFFIX ".dylib"
#define LOCAL_PLUGIN_DLL_ALT_SUFFIX ".so"
#else
#define DEFAULT_X11_PATH ""
#endif
#if (MOZ_WIDGET_GTK == 2)
#define PLUGIN_MAX_LEN_OF_TMP_ARR 512
static void DisplayPR_LoadLibraryErrorMessage(const char *libName)
{
char errorMsg[PLUGIN_MAX_LEN_OF_TMP_ARR] = "Cannot get error from NSPR.";
if (PR_GetErrorTextLength() < (int) sizeof(errorMsg))
PR_GetErrorText(errorMsg);
fprintf(stderr, "LoadPlugin: failed to initialize shared library %s [%s]\n",
libName, errorMsg);
}
static void SearchForSoname(const char* name, char** soname)
{
if (!(name && soname))
return;
PRDir *fdDir = PR_OpenDir(DEFAULT_X11_PATH);
if (!fdDir)
return;
int n = strlen(name);
PRDirEntry *dirEntry;
while ((dirEntry = PR_ReadDir(fdDir, PR_SKIP_BOTH))) {
if (!PL_strncmp(dirEntry->name, name, n)) {
if (dirEntry->name[n] == '.' && dirEntry->name[n+1] && !dirEntry->name[n+2]) {
// name.N, wild guess this is what we need
char out[PLUGIN_MAX_LEN_OF_TMP_ARR] = DEFAULT_X11_PATH;
PL_strcat(out, dirEntry->name);
*soname = PL_strdup(out);
break;
}
}
}
PR_CloseDir(fdDir);
}
static bool LoadExtraSharedLib(const char *name, char **soname, bool tryToGetSoname)
{
bool ret = true;
PRLibSpec tempSpec;
PRLibrary *handle;
tempSpec.type = PR_LibSpec_Pathname;
tempSpec.value.pathname = name;
handle = PR_LoadLibraryWithFlags(tempSpec, PR_LD_NOW|PR_LD_GLOBAL);
if (!handle) {
ret = false;
DisplayPR_LoadLibraryErrorMessage(name);
if (tryToGetSoname) {
SearchForSoname(name, soname);
if (*soname) {
ret = LoadExtraSharedLib((const char *) *soname, nullptr, false);
}
}
}
return ret;
}
#define PLUGIN_MAX_NUMBER_OF_EXTRA_LIBS 32
#define PREF_PLUGINS_SONAME "plugin.soname.list"
#ifdef XP_SOLARIS
#define DEFAULT_EXTRA_LIBS_LIST "libXt" LOCAL_PLUGIN_DLL_SUFFIX ":libXext" LOCAL_PLUGIN_DLL_SUFFIX ":libXm" LOCAL_PLUGIN_DLL_SUFFIX
#else
#define DEFAULT_EXTRA_LIBS_LIST "libXt" LOCAL_PLUGIN_DLL_SUFFIX ":libXext" LOCAL_PLUGIN_DLL_SUFFIX
#endif
/*
this function looks for
user_pref("plugin.soname.list", "/usr/X11R6/lib/libXt.so.6:libXext.so");
in user's pref.js
and loads all libs in specified order
*/
static void LoadExtraSharedLibs()
{
// check out if user's prefs.js has libs name
nsresult res;
nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID, &res));
if (NS_SUCCEEDED(res) && (prefs != nullptr)) {
char *sonameList = nullptr;
bool prefSonameListIsSet = true;
res = prefs->GetCharPref(PREF_PLUGINS_SONAME, &sonameList);
if (!sonameList) {
// pref is not set, lets use hardcoded list
prefSonameListIsSet = false;
sonameList = PL_strdup(DEFAULT_EXTRA_LIBS_LIST);
}
if (sonameList) {
char *arrayOfLibs[PLUGIN_MAX_NUMBER_OF_EXTRA_LIBS] = {0};
int numOfLibs = 0;
char *nextToken;
char *p = nsCRT::strtok(sonameList,":",&nextToken);
if (p) {
while (p && numOfLibs < PLUGIN_MAX_NUMBER_OF_EXTRA_LIBS) {
arrayOfLibs[numOfLibs++] = p;
p = nsCRT::strtok(nextToken,":",&nextToken);
}
} else // there is just one lib
arrayOfLibs[numOfLibs++] = sonameList;
char sonameListToSave[PLUGIN_MAX_LEN_OF_TMP_ARR] = "";
for (int i=0; i<numOfLibs; i++) {
// trim out head/tail white spaces (just in case)
bool head = true;
p = arrayOfLibs[i];
while (*p) {
if (*p == ' ' || *p == '\t') {
if (head) {
arrayOfLibs[i] = ++p;
} else {
*p = 0;
}
} else {
head = false;
p++;
}
}
if (!arrayOfLibs[i][0]) {
continue; // null string
}
bool tryToGetSoname = true;
if (PL_strchr(arrayOfLibs[i], '/')) {
//assuming it's real name, try to stat it
struct stat st;
if (stat((const char*) arrayOfLibs[i], &st)) {
//get just a file name
arrayOfLibs[i] = PL_strrchr(arrayOfLibs[i], '/') + 1;
} else
tryToGetSoname = false;
}
char *soname = nullptr;
if (LoadExtraSharedLib(arrayOfLibs[i], &soname, tryToGetSoname)) {
//construct soname's list to save in prefs
p = soname ? soname : arrayOfLibs[i];
int n = PLUGIN_MAX_LEN_OF_TMP_ARR -
(strlen(sonameListToSave) + strlen(p));
if (n > 0) {
PL_strcat(sonameListToSave, p);
PL_strcat(sonameListToSave,":");
}
if (soname) {
PL_strfree(soname); // it's from strdup
}
if (numOfLibs > 1)
arrayOfLibs[i][strlen(arrayOfLibs[i])] = ':'; //restore ":" in sonameList
}
}
// Check whether sonameListToSave is a empty String, Bug: 329205
if (sonameListToSave[0])
for (p = &sonameListToSave[strlen(sonameListToSave) - 1]; *p == ':'; p--)
*p = 0; //delete tail ":" delimiters
if (!prefSonameListIsSet || PL_strcmp(sonameList, sonameListToSave)) {
// if user specified some bogus soname I overwrite it here,
// otherwise it'll decrease performance by calling popen() in SearchForSoname
// every time for each bogus name
prefs->SetCharPref(PREF_PLUGINS_SONAME, (const char *)sonameListToSave);
}
PL_strfree(sonameList);
}
}
}
#endif //MOZ_WIDGET_GTK == 2
/* nsPluginsDir implementation */
bool nsPluginsDir::IsPluginFile(nsIFile* file)
{
nsAutoCString filename;
if (NS_FAILED(file->GetNativeLeafName(filename)))
return false;
#ifdef ANDROID
// It appears that if you load
// 'libstagefright_honeycomb.so' on froyo, or
// 'libstagefright_froyo.so' on honeycomb, we will abort.
// Since these are just helper libs, we can ignore.
const char *cFile = filename.get();
if (strstr(cFile, "libstagefright") != nullptr)
return false;
#endif
NS_NAMED_LITERAL_CSTRING(dllSuffix, LOCAL_PLUGIN_DLL_SUFFIX);
if (filename.Length() > dllSuffix.Length() &&
StringEndsWith(filename, dllSuffix))
return true;
#ifdef LOCAL_PLUGIN_DLL_ALT_SUFFIX
NS_NAMED_LITERAL_CSTRING(dllAltSuffix, LOCAL_PLUGIN_DLL_ALT_SUFFIX);
if (filename.Length() > dllAltSuffix.Length() &&
StringEndsWith(filename, dllAltSuffix))
return true;
#endif
return false;
}
/* nsPluginFile implementation */
nsPluginFile::nsPluginFile(nsIFile* file)
: mPlugin(file)
{
}
nsPluginFile::~nsPluginFile()
{
}
nsresult nsPluginFile::LoadPlugin(PRLibrary **outLibrary)
{
PRLibSpec libSpec;
libSpec.type = PR_LibSpec_Pathname;
bool exists = false;
mPlugin->Exists(&exists);
if (!exists)
return NS_ERROR_FILE_NOT_FOUND;
nsresult rv;
nsAutoCString path;
rv = mPlugin->GetNativePath(path);
if (NS_FAILED(rv))
return rv;
libSpec.value.pathname = path.get();
#if (MOZ_WIDGET_GTK == 2)
// Normally, Mozilla isn't linked against libXt and libXext
// since it's a Gtk/Gdk application. On the other hand,
// legacy plug-ins expect the libXt and libXext symbols
// to already exist in the global name space. This plug-in
// wrapper is linked against libXt and libXext, but since
// we never call on any of these libraries, plug-ins still
// fail to resolve Xt symbols when trying to do a dlopen
// at runtime. Explicitly opening Xt/Xext into the global
// namespace before attempting to load the plug-in seems to
// work fine.
#if defined(XP_SOLARIS)
// Acrobat/libXm: Lazy resolving might cause crash later (bug 211587)
*outLibrary = PR_LoadLibraryWithFlags(libSpec, PR_LD_NOW);
pLibrary = *outLibrary;
#else
// Some dlopen() doesn't recover from a failed PR_LD_NOW (bug 223744)
*outLibrary = PR_LoadLibraryWithFlags(libSpec, 0);
pLibrary = *outLibrary;
#endif
if (!pLibrary) {
LoadExtraSharedLibs();
// try reload plugin once more
*outLibrary = PR_LoadLibraryWithFlags(libSpec, 0);
pLibrary = *outLibrary;
if (!pLibrary) {
DisplayPR_LoadLibraryErrorMessage(libSpec.value.pathname);
return NS_ERROR_FAILURE;
}
}
#else
*outLibrary = PR_LoadLibraryWithFlags(libSpec, 0);
pLibrary = *outLibrary;
#endif // MOZ_WIDGET_GTK == 2
#ifdef DEBUG
printf("LoadPlugin() %s returned %lx\n",
libSpec.value.pathname, (unsigned long)pLibrary);
#endif
if (!pLibrary) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult nsPluginFile::GetPluginInfo(nsPluginInfo& info, PRLibrary **outLibrary)
{
*outLibrary = nullptr;
info.fVersion = nullptr;
// Sadly we have to load the library for this to work.
nsresult rv = LoadPlugin(outLibrary);
if (NS_FAILED(rv))
return rv;
const char* (*npGetPluginVersion)() =
(const char* (*)()) PR_FindFunctionSymbol(pLibrary, "NP_GetPluginVersion");
if (npGetPluginVersion) {
info.fVersion = PL_strdup(npGetPluginVersion());
}
const char* (*npGetMIMEDescription)() =
(const char* (*)()) PR_FindFunctionSymbol(pLibrary, "NP_GetMIMEDescription");
if (!npGetMIMEDescription) {
return NS_ERROR_FAILURE;
}
const char* mimedescr = npGetMIMEDescription();
if (!mimedescr) {
return NS_ERROR_FAILURE;
}
rv = ParsePluginMimeDescription(mimedescr, info);
if (NS_FAILED(rv)) {
return rv;
}
nsAutoCString path;
if (NS_FAILED(rv = mPlugin->GetNativePath(path)))
return rv;
info.fFullPath = PL_strdup(path.get());
nsAutoCString fileName;
if (NS_FAILED(rv = mPlugin->GetNativeLeafName(fileName)))
return rv;
info.fFileName = PL_strdup(fileName.get());
NP_GetValueFunc npGetValue = (NP_GetValueFunc)PR_FindFunctionSymbol(pLibrary, "NP_GetValue");
if (!npGetValue) {
return NS_ERROR_FAILURE;
}
const char *name = nullptr;
npGetValue(nullptr, NPPVpluginNameString, &name);
if (name) {
info.fName = PL_strdup(name);
}
else {
info.fName = PL_strdup(fileName.get());
}
const char *description = nullptr;
npGetValue(nullptr, NPPVpluginDescriptionString, &description);
if (description) {
info.fDescription = PL_strdup(description);
}
else {
info.fDescription = PL_strdup("");
}
return NS_OK;
}
nsresult nsPluginFile::FreePluginInfo(nsPluginInfo& info)
{
if (info.fName != nullptr)
PL_strfree(info.fName);
if (info.fDescription != nullptr)
PL_strfree(info.fDescription);
for (uint32_t i = 0; i < info.fVariantCount; i++) {
if (info.fMimeTypeArray[i] != nullptr)
PL_strfree(info.fMimeTypeArray[i]);
if (info.fMimeDescriptionArray[i] != nullptr)
PL_strfree(info.fMimeDescriptionArray[i]);
if (info.fExtensionArray[i] != nullptr)
PL_strfree(info.fExtensionArray[i]);
}
PR_FREEIF(info.fMimeTypeArray);
PR_FREEIF(info.fMimeDescriptionArray);
PR_FREEIF(info.fExtensionArray);
if (info.fFullPath != nullptr)
PL_strfree(info.fFullPath);
if (info.fFileName != nullptr)
PL_strfree(info.fFileName);
if (info.fVersion != nullptr)
PL_strfree(info.fVersion);
return NS_OK;
}
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